Rolls TU78 User Manual

LIMITED WARRANTY

TUNING BAND SELECT

OUTPUT

ANTENNA INPUTS

TU78

AM FM FMst

STER

STATION

AM: kHz

FM: MHz

87

101

95

92

88

108

104

106

530

950

675

570

1100

1250

1450
1550

1610

800

99

TUNING

TUNING BAND SELECT

OUTPUT

ANTENNA INPUTS

TU78

This product is warranted to the original consumer purchaser to be
free from defects in materials and workmanship under normal installation,
use and service for a period of one (1) year from the date of purchase as
shown on the purchaser’s receipt.

The obligation of Rolls Corporation under this warranty shall be
limited to repair or replacement (at our option), during the warranty period of
any part which proves defective in material or workmanship under normal
installation, use and service, provided the product is returned to Rolls
Corporation, TRANSPORTATION CHARGES PREP AID. Products returned
to us or to an authorized Service Center must be accompanied by a copy of
the purchase receipt. In the absence of such purchase receipt, the warranty
period shall be one (1) year from the date of manufacture.

This warranty shall be invalid if the product is damaged as a result of
defacement, misuse, abuse, neglect, accident, destruction or alteration of the
serial number, improper electrical voltages or currents, repair, alteration or
maintenance by any person or party other than our own service facility or an
authorized Service Center, or any use violative of instructions furnished by
us.

This one-year warranty is in lieu of all expressed warranties, obliga­tions or liabilities. ANY IMPLIED WARRANTIES, OBLIGATIONS, OR
LIABILITIES, INCLUDING BUT NOT LIMITED TO THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PAR­TICULAR PURPOSE, SHALL BE LIMITED IN DURATION TO THE
ONE YEAR DURATION OF THIS WRITTEN LIMITED WARRANTY.
Some states do not allow limitations on how long an implied warranty lasts,
so the above limitation may not apply to you.

IN NO EVENT SHALL WE BE LIABLE FOR ANY SPECIAL,
INCIDENT AL OR CONSEQUENTIAL DAMAGES FOR BREACH OF
THIS OR ANY OTHER WARRANTY, EXPRESSED OR IMPLIED,
WHATSOEVER. Some states do not allow the exclusion or limitation of
special, incidental or consequential damages so the above limitation or
exclusion may not apply to you. This warranty gives you specific legal
rights, and you may also have other rights which vary from state to state.

Salt Lake City, Utah

9/02

TU78

AM/FM ProTuner

SPECIFICATIONS

FM SECTION
Frequency Range: 87.5 - 108 MHz
IF Freuquency: 10.7 MHz
30dB Sensitivity: <=10 mV
S/N @ 1mV: >=48 dB
3 dB Limiting: <= 8mV
IF Rejection: >= 80 dB
Image Rejection: >= 25 dB
THD @ 1 mV 40 kHz dev.: <= 1.5%
Stereo Separation (1 kHz): >= 25 dB
AM Suppression Mod: 30 % FM Dev., 22.5 kHz Input , Level 1 mV
De-Emphasis: 75mS

AM SECTION
Frequency Range: 522 - 1650 kHz
IF Frequency: 455/460 kHz
20dB Sensitivity: <= 1mV / M
S/N @ 5mV/M: >= 35 dB
IF Rejection: >= 45 dB
Image Rejection: >= 30 dB
AGC Action: >= 45 dB
THD @ 5mV/M: <= 2%
Power Supply: Rolls PS27, 12VDC, 150mA, center neg.
Dimensions: 108mm W x 70mm D x 23mm H

Owners Manual

INTRODUCTION

TUNING BAND SELECT

OUTPUT

ANTENNA INPUTS

TU78

OPERATION

Thank you for your purchase of the TU78 AM/FM ProTuner. The TU78 offers the
installer or consultant a small and affordable solution for any compact am/fm tuner
need. It features 75 ohm FM and 300 ohm AM antenna inputs, stereo line-level RCA
outputs, a variable tuning control and an AM, FM stereo, and FM mono band select
switch. An LED indicates when a station is locked, another indicates a stereo output
signal is present at the outputs.

NOTE: This manual assumes the user has a basic working knowledge of
the proper connection and operation of professional audio equipment.

INSPECTION

1. Unpack and inspect the TU78 ProTuner box and package. Included in the package
should be the TU78 ProTuner, an AM loop antenna, the PS27 12 VDC power supply,
this owners manual, and a warranty card. Please note that an FM antenna is not
included.

If obvious physical damage is noticed, contact the carrier immediately to make a
damage claim. We suggest saving the shipping carton and packing materials for
safely transporting the unit in the future.

2. Please visit us online at www.rolls.com, select Register Your Warranty Here
button and complete the online registration form. Or complete the included Warranty
Registration Card and return it to the factory.

DESCRIPTION

FRONT PANEL

ANTENNA INPUTS

TUNING BAND SELECT

AM: kHz

101

99

950

1100

800

95

675

92

570

88

530

87

FM: MHz

TUNING

Band Select Switch: Selects between the AM band, FM (mono) band, and FM
stereo.

104

1250

106

1450

108

1550

1610

OUTPUT

AM FM FMst

STER

STATION

Tuning: Selects the AM or FM frequency. NO TE:

TU78

THE MARKINGS ON THE UNIT ARE APPROXI­MATE AND SHOULD BE USED AS REFER­ENCE ONLY.
Stereo LED: Indicates a stereo signal is being
sent to the Outputs.
Station LED: When lit, indicates a station is
locked.

Properly connect the antennas, audio outputs,
and power supply to the TU78. Using the Band
Select switch, select the AM, FM, or FM Stereo
band. Apply po wer to y our audio system and
verify sound.

Adjust the Tuning control to select the desired
radio station. Use the front panel frequency
markings only as a reference, they are not
exact. When a station is reached, the STATION
LED will light. If the TU78 is operating in FM
Stereo mode, the STER LED will light when a
stereo signal is present at the Output.

SCHEMATIC

TU78

OUTPUT

TUNING BAND SELECT

REAR PANEL
DC Input: Connect to the included Rolls PS27 12

ANTENNA INPUTS

VDC adapter.
OUTPUT: Stereo RCA line le v el (0 dB) output.
AM 300 W: AM antenna input. Connect to the
included 300 W loop antenna.
FM 75W: FM antenna input. Connect to a 75 W
antenna (not included).